US5597272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated hard alloy tool
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1995-04-24
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Granted: 1997-01-28
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Expires: 2015-04-24
Abstract
Abstract An improved coated hard alloy tool having a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of the substrate, the coating film including at least one oxide layer. The top several layers of the coating film are missing partially or completely in an area where the tool is brought into frictional contact with a workpiece. At least one oxide layer (such as Al2O3 layer) is included in the missing layers. This increases wear resistance of the coated hard alloy tool.
Inventors
- 👤 Hideki Moriguchi
- 👤 Daisuke Murakami
- 👤 Akihiko Ikegaya
- 👤 Toshio Nomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:30
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/56; B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/145; C23C16/22; C23C16/30; C23C16/40; C23C16/403; C23C30/00; C23C30/005; B23B2200/00; B23B2200/20; B23B2200/202; B23B2224/00; B23B2224/04; B23B2224/32; B23B2224/36; B23C; B23C2200/00; B23C2200/20; B23C2200/201; B23C2200/203; B23C2200/24; B23C2200/243; B23C2224/00; B23C2224/04; B23C2224/32; B23C2224/36; Y; Y10; Y10T; Y10T407/00; Y10T407/27; Y10T407/28; Y10T408/00; Y10T408/78; Y10T408/81; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24413; Y10T428/24802; Y10T428/24926
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing.
Claim 2
Dependent Claim
111 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing.
Claim 3
Dependent Claim
143 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 .
Claim 4
Dependent Claim
143 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 .
Claim 5
Dependent Claim
169 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer whose main component is a nitride or a carbonitride.
Claim 6
Dependent Claim
169 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer whose main component is a nitride or a carbonitride.
Claim 7
Dependent Claim
173 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer of TiCN having a mol fraction of C:N of between 5:5 and 7:3.
Claim 8
Dependent Claim
173 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer of TiCN having a mol fraction of C:N of between 5:5 and 7:3.
Claim 9
Dependent Claim
181 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer whose main component is a nitride or a carbonitride, and has a residual stress of -5 to 10 kgf/mm 2 .
Claim 10
Dependent Claim
181 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, at least one oxide layer being included in missing layers among said top several layers, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer whose main component is a nitride or a carbonitride, and has a residual stress of -5 to 10 kgf/mm 2 .
Claim 11
Dependent Claim
180 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, all of oxide layers included in said coating film being removed along said ridge, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer whose main component is a nitride or a carbonitride, and has a residual stress of -5 to 10 kgf/mm 2 .
Claim 12
Dependent Claim
180 words
A coated hard alloy tool having a cutting edge including a ridge and comprising a substrate made of a hard alloy, and a multi-layer ceramic coating film provided on the surface of said substrate, said coating film including at least one oxide layer and at least one non-oxide layer, the top several layers of said coating film being missing partially or completely along said ridge, all of oxide layers included in said coating film being removed along said ridge, whereby a non-oxide layer, having an average surface roughness Ra not more than 0.05 μm, of said coating film is exposed along said ridge where said top several layers are missing, wherein said at least one oxide layer included in said top several layers is an Al 2 O 3 layer or a layer whose main component is Al 2 O 3 , and said layer exposed along said ridge where said top several layers are missing is a layer whose main component is a nitride or a carbonitride, and has a residual stress of -5 to 10 kgf/mm 2 .
Claim 13
Dependent Claim
42 words
A coated hard alloy tool as claimed in claim 5 or 6, wherein said layer exposed along said ridge where said top several layers are missing is a layer of TiCN having a mol fraction of C:N of between 5:5 and 7:3.
References Cited (Backward Citations)
US4643620A
Cited
US4755399A
Cited
US4720437A
Cited
US4966501A
Cited
US5431072A
Cited
US4984940A
Cited
US5250367A
Cited
JPH05111810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-28 | 2000-07-29 | 2001-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-28 | 2004-07-29 | 2005-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-28 | 2008-07-29 | 2009-01-28 | $7700.00 | Window Closed / Lapsed |